Types of Axis in WinUI Chart (SfCartesianChart)

28 Jun 202210 minutes to read

Cartesian chart supports the following types of chart axis.

  • NumericalAxis
  • CategoryAxis
  • DateTimeAxis

Numerical Axis

NumericalAxis is used to plot numerical values to the chart. NumericalAxis can be added for both XAxes and YAxes.

<chart:SfCartesianChart>
. . .
<chart:SfCartesianChart.XAxes>
    <chart:NumericalAxis/>
</chart:SfCartesianChart.XAxes>
<chart:SfCartesianChart.YAxes>
    <chart:NumericalAxis/>
</chart:SfCartesianChart.YAxes>

</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
. . .
chart.XAxes.Add(new NumericalAxis());

chart.YAxes.Add(new NumericalAxis());

NumericalAxis support in WinUI Chart

Interval

Axis interval can be customized by using the Interval property. By default, interval will be calculated based on the minimum and maximum value of the provided data.

<chart:SfCartesianChart>
. . .
<chart:SfCartesianChart.XAxes>
    <chart:NumericalAxis Interval="10" />
</chart:SfCartesianChart.XAxes>
<chart:SfCartesianChart.YAxes>
    <chart:NumericalAxis/>
</chart:SfCartesianChart.YAxes>

</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
. . .
NumericalAxis primaryAxis = new NumericalAxis()
{
    Interval = 10, 
};
chart.XAxes.Add(primaryAxis);

chart.YAxes.Add(new NumericalAxis());

NumericalAxis interval support in WinUI Chart

Customizing the Range

Maximum and Minimum properties of axis is used for setting the maximum and minimum value of the axis range respectively.

NOTE

If minimum or maximum value is set, the other value is calculated by default internally.

<chart:SfCartesianChart.YAxes>
    <chart:NumericalAxis Maximum="2750" Minimum="250" Interval="250"/>
</chart:SfCartesianChart.YAxes>
NumericalAxis secondaryAxis = new NumericalAxis()
{
    Maximum = 2750,
    Minimum = 250,
    Interval = 250
};
chart.YAxes.Add(secondaryAxis);

NumericalAxis range customization in WinUI Chart

Category Axis

The CategoryAxis is an indexed based axis that plots values based on the index of the data point collection. The points are equally spaced here.

<chart:SfCartesianChart>
. . .
<chart:SfCartesianChart.XAxes>
    <chart:CategoryAxis/>
</chart:SfCartesianChart.XAxes>

</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
. . .
chart.XAxes.Add(new CategoryAxis());

CategoryAxis support in WinUI Chart

Label placement

The LabelPlacement property in CategoryAxis is used to placed the axis labels based on ticks and between ticks. The default value of LabelPlacement is OnTicks.

<chart:SfCartesianChart>
. . .
<chart:SfCartesianChart.XAxes>
    <chart:CategoryAxis LabelPlacement="BetweenTicks"/>
</chart:SfCartesianChart.XAxes>

</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
. . .
CategoryAxis primaryAxis = new CategoryAxis()
{
    LabelPlacement = LabelPlacement.BetweenTicks
};
chart.XAxes.Add(primaryAxis);

Axis label placement support in WinUI Chart

Interval

By default, the CategoryAxis axis labels are display with fixed interval 1. It can customized by using the Interval property of axis.

<chart:SfCartesianChart>
. . .
<chart:SfCartesianChart.XAxes>
    <chart:CategoryAxis Interval="2" />
</chart:SfCartesianChart.XAxes>
<chart:SfCartesianChart.YAxes>
    <chart:NumericalAxis/>
</chart:SfCartesianChart.YAxes>

</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
. . .
CategoryAxis primaryAxis = new CategoryAxis()
{
    Interval = 2, 
};
chart.XAxes.Add(primaryAxis);

chart.YAxes.Add(new NumericalAxis());

CategoryAxis interval support in WinUI Chart

IsIndexed

By default, CategoryAxis plots the values based on the index of the data points. However, the CategoryAxis can be made to plot the data points based on its data, instead of index value by disabling the IsIndexed property of CategoryAxis.

<chart:SfCartesianChart>
. . .
<chart:SfCartesianChart.XAxes>
    <chart:CategoryAxis IsIndexed="False"/>
</chart:SfCartesianChart.XAxes>

</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
. . .
CategoryAxis primaryAxis = new CategoryAxis()
{
    IsIndexed = false,
};
chart.XAxes.Add(primaryAxis);

DateTime Axis

DateTimeAxis is used to plot DateTime values. The DateTimeAxis is widely used to make financial charts in places like the Stock Market, where index plotting is done every day.

<chart:SfCartesianChart>
. . .
<chart:SfCartesianChart.XAxes>
    <chart:DateTimeAxis LabelFormat="MMM-yy"/>
</chart:SfCartesianChart.XAxes>

</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
. . .
DateTimeAxis primaryAxis = new DateTimeAxis()
{
    LabelFormat = "MMM-yy"
};
chart.XAxes.Add(primaryAxis);

DateTimeCategoryAxis support in WinUI Chart

Interval

In DateTimeAxis, intervals can be customized by using the Interval and IntervalType properties. For example, setting Interval as 6 and IntervalType as Months will consider 6 months as interval.

<chart:SfCartesianChart>
. . .
<chart:SfCartesianChart.XAxes>
    <chart:DateTimeAxis Interval="6" 
	                    IntervalType="Months" 
						LabelFormat="MMM-yy"/>
</chart:SfCartesianChart.XAxes>
<chart:SfCartesianChart.YAxes>
    <chart:NumericalAxis/>
</chart:SfCartesianChart.YAxes>

</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
. . .
DateTimeAxis primaryAxis = new DateTimeAxis()
{
    Interval = 6, 
    IntervalType = DateTimeIntervalType.Months,
    LabelFormat = "MMM-yy"
};
chart.XAxes.Add(primaryAxis);

chart.YAxes.Add(new NumericalAxis());

DateTimeAxis interval support in WinUI Chart

Customizing the Range

Minimum and Maximum properties behavior is same as in NumericalAxis instead of setting numerical value, have to set date time values.

<chart:SfCartesianChart>
. . .
<chart:SfCartesianChart.XAxes>
    <chart:DateTimeAxis Minimum="2021/05/1" 
						Maximum="2021/11/01"  
						LabelFormat="MMM-yy"/>
</chart:SfCartesianChart.XAxes>

</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
. . .
DateTimeAxis primaryAxis = new DateTimeAxis()
{
    Minimum = new DateTime(2021,05,10),
    Maximum = new DateTime(2021,11,01),
    LabelFormat = "MMM-dd",
};
chart.XAxes.Add(primaryAxis);

DateTimeAxis range customization support in WinUI Chart

Inversed

Axis can be inverted by using the IsInversed property. The default value of this property is False.

<chart:SfCartesianChart>
. . .
<chart:SfCartesianChart.YAxes>
    <chart:NumericalAxis IsInversed="True"/>
</chart:SfCartesianChart.YAxes>

</chart:SfCartesianChart>
SfCartesianChart chart = new SfCartesianChart();
. . .
NumericalAxis secondaryAxis = new NumericalAxis();
secondaryAxis.IsInversed = true;
chart.YAxes.Add(secondaryAxis);

Inversed axis support in WinUI Chart

Multiple Axes

Cartesian charts provides support to arrange the multiple series inside the same chart area with specified x-axis and y-axis. There are two properties XAxisName and YAxisName in all the Cartesian series type, which is used to provide multiple axes support. These axes can be arranged in a stacking order or in a side by side pattern.

By default, all the series are plotted based on the 0th index axis of XAxes and YAxes.

<chart:SfCartesianChart>
    . . .
	<chart:SfCartesianChart.XAxes>
		<chart:DateTimeAxis ShowMajorGridLines="False" />
	</chart:SfCartesianChart.XAxes>

	<chart:SfCartesianChart.YAxes>
		<chart:NumericalAxis ShowMajorGridLines="False" />
		<chart:NumericalAxis Name="Series_YAxis" 
							 ShowMajorGridLines="False" />
	</chart:SfCartesianChart.YAxes>

    <chart:SfCartesianChart.Series>
        <chart:SfCartesianChart.Series>
            <chart:ColumnSeries ItemsSource="{Binding Data1}" 
                                XBindingPath="Date"
                                YBindingPath="Value"
					            YAxisName="Series_YAxis">
            </chart:ColumnSeries>
            <chart:SplineSeries ItemsSource="{Binding Data}" 
                                XBindingPath="Date"
                                YBindingPath="Value"/>
    </chart:SfCartesianChart.Series>

</chart:SfCartesianChart>

</ContentPage>
SfCartesianChart chart = new SfCartesianChart();
. . .
DateTimeAxis primaryAxis = new DateTimeAxis()
{
    ShowMajorGridLines = false
};
chart.XAxes.Add(primaryAxis);

NumericalAxis secondaryAxis = new NumericalAxis()
{
    ShowMajorGridLines = false
};
secondaryAxis.Name = "Series_YAxis";
chart.YAxes.Add(secondaryAxis);

NumericalAxis secondaryAxis1 = new NumericalAxis();
chart.YAxes.Add(secondaryAxis1);

ColumnSeries series1 = new ColumnSeries()
{
    YAxisName = "Series_YAxis"
    ItemsSource = new ViewModel().Demands,
    XBindingPath = "Demand",
    YBindingPath = "Year2011"
};

SplineSeries series2 = new SplineSeries()
{
    ItemsSource = new ViewModel().Demands,
    XBindingPath = "Date",
    YBindingPath = "Year2011",
};

chart.Series.Add(series1);
chart.Series.Add(series2);

Multiple axes support in WinUI Chart

In the above image, the ColumnSeries is plotted based on additional axes of YAxes collection, and SplineSeries is plotted based on axis of the collection’s 0th index.